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Nickel-titanium alloy self-sealing bolt

A nickel-titanium alloy, self-sealing technology, applied in the directions of bolts, screws, nuts, etc., can solve the problem of insufficient bolt pre-tightening force, and achieve the effects of convenient and fast heating, easy installation and reduced loss.

Pending Publication Date: 2021-05-28
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned defects in the prior art, the task of the present invention is to provide a nickel-titanium alloy self-sealing bolt, which solves the problem of insufficient bolt pretightening force caused by loose bolt connection, and ensures the reliability of bolt connection

Method used

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  • Nickel-titanium alloy self-sealing bolt
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  • Nickel-titanium alloy self-sealing bolt

Examples

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the examples, but not as a limitation of the present invention.

[0020] Please combine Figure 1 to Figure 4 As shown, a nickel-titanium alloy self-sealing bolt involved in the embodiment of the present invention includes a stud 1 and a nut 2, the nut 2 is connected to the head end of the stud 1, the nut 2 can be a standard hexagonal structure, or It can be set to other structures such as slots or cross slots. A stepped hole 101 is provided at the tail end of the stud 1 , and a threaded connection hole 102 is provided at the bottom of the stepped hole 101 . The T-shaped nickel-titanium alloy sleeve 3 is made by axial pre-stretching, and has a size structure matching the stepped hole 101 . The axial distance of the larger diameter tail end 301 of the T-shaped nickel-titanium alloy sleeve 3 is smaller than the axial distance of the large-diameter section of the stepped hole 101, so that the T-sha...

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Abstract

The invention discloses a nickel-titanium alloy self-sealing bolt. The nickel-titanium alloy self-sealing bolt comprises a stud and a nut, the nut is connected to the head end of the stud, a stepped hole is formed in the tail end of the stud, a T-shaped nickel-titanium alloy sleeve with the increased diameter of the tail end is arranged in the stepped hole, the T-shaped nickel-titanium alloy sleeve is manufactured through axial pre-stretching machining, the tail end of the stud is connected with a bolt inner core for limiting the axial positions of the T-shaped nickel-titanium alloy sleeve and the stud, and an electric heating wire is arranged in the T-shaped nickel-titanium alloy sleeve. The problem of insufficient bolt pre-tightening force caused by loose bolt connection can be solved, installation is easy and convenient, the lack of pre-tightening force of a bolt can be effectively compensated, and the reliability of bolt connection is guaranteed.

Description

technical field [0001] The invention relates to a bolt, in particular to a nickel-titanium alloy self-sealing bolt. Background technique [0002] Industrial pipelines play an increasingly important role in the transportation of high temperature, high pressure, flammable and explosive media. At the same time, more and more potential safety hazards have been exposed during pipeline transportation. In recent years, with the increasing demand for oil and natural gas, the scale of pipeline transportation has also been expanding. The failure of flange connection due to insufficient pre-tightening force has become one of the safety hazards in industrial production. [0003] Leaks are prone to occur at pipe flange connections. In the daily use of pipelines, there is a large temperature difference between the ambient temperature and the temperature inside the pipeline, which can easily lead to deformation of the pipeline. The preload has an important influence on the sealing perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/04F16B39/02H05B3/02
CPCF16B35/041F16B39/02H05B3/02
Inventor 曹君陈智超李梦彪黄厅夏子颖徐进亚
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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